The 22-year-old was a key figure at the heart of Chelsea’s defence last season as Maresca’s side finished fourth in the Premier League and won the Club World Cup this summer.
Colwill returned to training this week following his three-week break after Chelsea’s Club World Cup campaign.
However, the centre-back has now suffered an injury and is set to be ruled out of Chelsea’s Premier League game against Palace at Stamford Bridge on August 17.
‘We had a problem in the last two days about Levi Colwill,’ Maresca said on Thursday.
Your ultimate guide to the football season
In The Mixer: Exclusive analysis, FPL tips and transfer talk sent straight to your inbox every week – click here and sign up before Friday to make sure you don't miss the first edition.
‘We don’t know how long he is going to be out. For us we’ll see, hopefully not too long but for sure, it’s a problem for us.
When asked specifically about Colwill’s injury, Maresca replied: ‘We need to wait, we don’t know yet.’
Levi Colwill returned to training with Chelsea this week (Getty)
Asked if Colwill’s injury changes the club’s plan in the transfer market, Maresca said: ‘It depends. We need to wait and we will see.
‘We know each other from last year and we know how important Levi has been.
‘I spoke with him yesterday, I told him what we achieved last year it was because of him and he was a main player for us.’
Maresca also insisted that he had ‘no doubt’ about new signing Jorrel Hato, who joined Chelsea in a £37 million deal from Ajax earlier this month.
‘He’s much more mature than his age, his character and this kind of thing,
‘Even with him, the message is exactly the same, different country, different league, different tempo, different intensity, so he needs to adapt. But for sure, no doubt, he’s going to help us.’
Viktor Gyokeres was handed his first start in Arsenal’s 3-2 defeat to Villarreal (Picture: Getty)
Arsenal boss Mike Arteta says he saw ‘a lot of things’ to be positive about in Viktor Gyokeres’ display against Villarreal and is confident the striker will be in a ‘better condition’ to face Athletic Bilbao this weekend.
Gyokeres was named in Arteta’s starting XI for the first time having swapped Sporting for Arsenal last month and the 27-year-old will have been desperate to open his account in front of a home crowd at the Emirates.
But it wasn’t to be for Gyokeres, despite the Swede’s new team-mates making a noticeable effort to help get their marquee summer signing off the mark in the entertaining 3-2 defeat, in which Nicolas Pepe came back to haunt the Gunners.
Gyokeres’ best opportunity came just before he was substituted on the hour-mark in north London, but the forward’s powerful effort was well saved by Villarreal goalkeeper Luiz Junior.
While Christian Norgaard and Martin Odegaard did manage to get on the scoresheet in the pre-season friendly, goals from Pepe, Karl Etta Eyong and Arnaut Danjuma were ultimately enough to secure victory for the visitors.
Your ultimate guide to the football season
In The Mixer: Exclusive analysis, FPL tips and transfer talk sent straight to your inbox every week – click here and sign up before Friday to make sure you don't miss the first edition.
Arteta will no doubt be hoping his side return to winning ways when they return to the stadium on Saturday to face Athletic Bilbao in the Emirates Cup.
Asked if it could take some time for Gyokeres to get acclimatised to a new environment, Arteta told reporters: ‘We already broke that line today because I think it was very important for him to start a match and start to have the feeling and the connection with the team.
The Swede was taken off on the hour-mark at the Emirates (Picture: Getty)
Pepe came back to haunt the Gunners (Picture: Getty)
‘He’s been with us only a week or so, but I really saw a lot of things and a lot of purpose, especially the way he was attacking certain spaces.
‘So in general, for a lot of players that haven’t played many minutes, we have a lot now that they’re going to be ready for Saturday in a much better condition.’
Pressed on how long it could take his players to get used to Gyokeres, the Arsenal head coach replied: ‘I hope days, and every day in training I think he’s getting a really good feeling.
Up Next
‘I think he’s built connections as well outside, which I think is really important with players that are going to help him to get in the position that he needs to get in.
‘On his fitness level, I think he hasn’t trained really with the team for two months, so he’s done now six or five sessions, I think, before today.
‘So I think on Saturday again he will take another step and he will be in a better condition.’
Arteta has ‘no doubt’ that Gyokeres will be ‘100 per cent’ ready to make his mark come August 17, when Arsenal open their Premier League campaign against Manchester United.
‘I think mentally and understanding what he needs to do, he will be 100 per cent or more because he’s so willing and so confident as well that he can deliver straightaway,’ he added.
‘I have no doubt that he will be in a really good place.’
Havertz played no part in the loss to Villarreal (Picture: Getty)
Arteta reassured Arsenal fans over Kai Havertz’s fitness after the German was missing from his matchday squad to face Villarreal.
‘Yesterday in training he felt something and this morning he wasn’t quite right, so we decided to rest him,’ the Spaniard explained.
‘I think it’s going to be a matter of a couple of days, hopefully at the weekend, if everything goes to plan, I think he will be fit.’
The contest also came too soon for Gabriel Magalhaes, Leandro Trossard and Riccardo Calafiori, but there is a ‘chance’ all three could feature against Athletic Bilbao.
‘The three that we lost during the tour, it was Gabi, Leo and Richy, and for Saturday I think both of them have a chance, if everything in the next few days evolves in the way that it’s been evolving in the last few days,’ he added.
Morgan Rogers was forced off with an ankle injury in Aston Villa’s win against Roma (Action Images via Reuters)
Aston Villa have been handed an injury scare with Morgan Rogers ahead of the new Premier League season.
Unai Emery’s side sealed a 4-0 victory against Roma on Wednesday night with Emi Buendia, Jacob Ramsey, Ollie Watkins and Donyell Malen all on target.
Rogers, meanwhile, was brought on as a substitute for the start of the second half but suffered an ankle injury in just under three minutes.
The 23-year-old required treatment from Villa’s medical team and was helped to his feet.
The midfielder attempted to carry on but then signalled to the bench that he was unable to continue and walked off the pitch as he was replaced by Jamaldeen Jimoh-Aloba in the 52nd minute.
Your ultimate guide to the football season
In The Mixer: Exclusive analysis, FPL tips and transfer talk sent straight to your inbox every week – click here and sign up before Friday to make sure you don't miss the first edition.
Morgan Rogers was on the pitch for less than three minutes before getting injured (Shutterstock)
Villa are due to play Marseille in their next pre-season friendly on Saturday before facing Villarreal on Sunday night.
Emery’s side begin their new Premier League campaign at home to Newcastle United on August 16.
Inter Milan are considering a bid for Jadon Sancho (Picture: Getty Images)
Jadon Sancho and Alejandro Garnacho have emerged as transfer targets for Inter Milan, but only if they miss out on their first choice.
Sancho and Garnacho are no longer in the first team plans at Old Trafford under Ruben Amorim, left out of pre-season action and firmly on the transfer list.
England international Sancho is wanted by Juventus and in the Saudi Pro League, but similarly to Garnacho, no move seems to be imminent.
Your ultimate guide to the football season
In The Mixer: Exclusive analysis, FPL tips and transfer talk sent straight to your inbox every week – click here and sign up before Friday to make sure you don't miss the first edition.
Inter has now emerged as a possible destination for both forwards, but only if Cristian Chivu’s side miss out on their primary target, Ademola Lookman.
Ademola Lookman is extremely keen to leave Atalanta (Picture: Getty Images)
Inter have had a £39m bid for Lookman rejected this summer, with the player saying Atalanta have broken a promise to let him leave.
Atalanta have since insisted that the agreement for Lookman to leave this summer was only to clubs outside of Serie A.
Italian transfer expert Gianluca Di Marzio reports that Inter are willing to wait for the stalemate between Lookman and Atalanta to be resolved, but not forever.
If Inter do not get their man by the end of next week then they will move on to other targets, which include Sancho and Garnacho.
Alejandro Garnacho is reportedly keen to stay in England (Picture: Getty Images)
Di Marzio reports that also on Inter’s list of contingency plans are RB Leipzig’s Antonio Nusa and Chelsea’s Christopher Nkunku.
Gazzetta dello Sport that the name ‘gaining the most traction’ is Sancho, who has just one year left on his Old Trafford contract and is available for around £22m.
The issue for any club interested in the 25-year-old is that he earns a reported £300,000-a-week at Manchester United.
Manchester United are open to offers for Rasmus Hojlund (Picture: Getty Images)
There is also Serie A interest in Rasmus Hojlund, with AC Milan keen on the striker who has struggled to make an impact with the Red Devils.
